編譯
參考資訊：
https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html#introduction
步驟如下：
$ sudo apt-get update $ sudo apt-get install gcc git wget make libncurses-dev flex bison gperf python python-pip python-setuptools python-serial python-cryptography python-future python-pyparsing python-pyelftools $ cd $ wget https://dl.espressif.com/dl/xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz $ tar xvf xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz $ sudo mv xtensa-esp32-elf /opt/esp32 $ cd $ git clone --recursive https://github.com/espressif/esp-idf.git $ export IDF_PATH=~/esp-idf $ cd esp-idf $ python -m pip install --user -r requirements.txt $ cd examples/get-started/hello_world $ export PATH=$PATH:/opt/esp32/bin $ make menuconfig
編譯
$ make
插入USB後，執行如下命令燒錄
$ make flash
Toolchain path: /opt/esp32/bin//xtensa-esp32-elf-gcc
Toolchain version: crosstool-ng-1.22.0-80-g6c4433a
Compiler version: 5.2.0
Python requirements from /home/steward/Downloads/esp-idf/requirements.txt are satisfied.
App "hello-world" version: v4.0-dev-478-gdf61612f8
Flashing binaries to serial port /dev/ttyUSB0 (app at offset 0x10000)...
esptool.py v2.7-dev
Serial port /dev/ttyUSB0
Connecting....
Chip is ESP32D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core, Coding Scheme None
MAC: 30:ae:a4:1c:68:ec
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Auto-detected Flash size: 4MB
Flash params set to 0x0220
Compressed 24464 bytes to 14609...
Wrote 24464 bytes (14609 compressed) at 0x00001000 in 1.3 seconds (effective 151.3 kbit/s)...
Hash of data verified.
Compressed 146464 bytes to 70368...
Wrote 146464 bytes (70368 compressed) at 0x00010000 in 6.2 seconds (effective 188.0 kbit/s)...
Hash of data verified.
Compressed 3072 bytes to 103...
Wrote 3072 bytes (103 compressed) at 0x00008000 in 0.0 seconds (effective 1762.2 kbit/s)...
Hash of data verified.
Leaving...
Hard resetting via RTS pin...
接著連接UART的RX、TX就可以看到輸出(Baudrate: 115200bps)
OPTIONS: I18n Compiled on Apr 22 2017, 09:14:19. Port /dev/ttyUSB0, 14:56:04 Press CTRL-A Z for help on special keys ets Jun 8 2016 00:22:57 rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) flash read err, 1000 ets_main.c 371 ets Jun 8 2016 00:22:57 rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:2 load:0x3fff0018,len:4 load:0x3fff001c,len:6364 load:0x40078000,len:11304 load:0x40080400,len:6700 entry 0x40080764 I (29) boot: ESP-IDF v4.0-dev-478-gdf61612f8 2nd stage bootloader I (29) boot: compile time 14:51:07 I (29) boot: Enabling RNG early entropy source... I (35) boot: SPI Speed : 40MHz I (39) boot: SPI Mode : DIO I (43) boot: SPI Flash Size : 4MB I (47) boot: Partition Table: I (51) boot: ## Label Usage Type ST Offset Length I (58) boot: 0 nvs WiFi data 01 02 00009000 00006000 I (66) boot: 1 phy_init RF data 01 01 0000f000 00001000 I (73) boot: 2 factory factory app 00 00 00010000 00100000 I (81) boot: End of partition table I (85) esp_image: segment 0: paddr=0x00010020 vaddr=0x3f400020 size=0x07794 ( 30612) map I (104) esp_image: segment 1: paddr=0x000177bc vaddr=0x3ffb0000 size=0x01eac ( 7852) load I (108) esp_image: segment 2: paddr=0x00019670 vaddr=0x40080000 size=0x00400 ( 1024) load I (112) esp_image: segment 3: paddr=0x00019a78 vaddr=0x40080400 size=0x06598 ( 26008) load I (131) esp_image: segment 4: paddr=0x00020018 vaddr=0x400d0018 size=0x1258c ( 75148) map I (158) esp_image: segment 5: paddr=0x000325ac vaddr=0x40086998 size=0x01650 ( 5712) load I (165) boot: Loaded app from partition at offset 0x10000 I (165) boot: Disabling RNG early entropy source... I (167) cpu_start: Pro cpu up. I (171) cpu_start: Application information: I (176) cpu_start: Project name: hello-world I (181) cpu_start: App version: v4.0-dev-478-gdf61612f8 I (187) cpu_start: Compile time: May 6 2019 14:51:10 I (193) cpu_start: ELF file SHA256: b0132b11b757dd84... I (199) cpu_start: ESP-IDF: v4.0-dev-478-gdf61612f8 I (206) cpu_start: Starting app cpu, entry point is 0x40080fdc I (0) cpu_start: App cpu up. I (216) heap_init: Initializing. RAM available for dynamic allocation: I (223) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM I (229) heap_init: At 3FFB2ED8 len 0002D128 (180 KiB): DRAM I (235) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM I (242) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM I (248) heap_init: At 40087FE8 len 00018018 (96 KiB): IRAM I (254) cpu_start: Pro cpu start user code I (272) cpu_start: Starting scheduler on PRO CPU. I (0) cpu_start: Starting scheduler on APP CPU. Hello world! This is ESP32 chip with 2 CPU cores, WiFi/BT/BLE, silicon revision 1, 4MB external flash
假如無法燒錄，則可以使用esptool.py進行燒錄
$ cd $IDF_PATH/components/esptool_py/esptool $ ./esptool.py --baud 920600 write_flash --flash_mode dio --flash_size 4MB 0 hello-world.bin